Compared to a general wellness programme, an 18-month exercise programme for older women improves bone mineral density and
fall risk but has similar improvements in predicted coronary heart disease risk

Exercise and health

It is widely recognised that exercise is good for the prevention of a large number of illnesses. This conclusion has been
drawn in large measure from observational studies that follow a group who choose to exercise and then compare them with a
group who choose not to. This method can lead to a number of biases in terms of other health behaviours; for example, women
who took hormone replacement therapy (HRT) were long thought to be protected against heart disease on the basis of …